PON (Passive Optical Network) ndi netiweki yapang'onopang'ono, kutanthauza kuti ODN (optical distribution network) pakati pa optical network.OLT(optical line terminal) ndiONU(optical network unit) ilibe zida zilizonse zogwira ntchito, ndipo imangogwiritsa ntchito ulusi wapamaso ndi zida zongogwira. PON makamaka utenga mfundo-to-multipoint maukonde dongosolo, umene ndi waukulu luso kuzindikira FTTB/FTTH.
Ukadaulo wa PON uli ndi zambiri, ndipo umasinthidwa mobwerezabwereza. Kukula kwaukadaulo wa xPON kumachokera ku APON, BPON, kenako GPON ndi EPON. Awa ndi matekinoloje amitundu yosiyanasiyana yopatsirana komanso njira zopatsirana zomwe zimapangidwa munthawi zosiyanasiyana.
EPON ndi chiyani?
EPON (Ethernet Passive Optical Network) ndi Ethernet passive Optical network. EPON imachokera paukadaulo wa PON wa Efaneti, womwe umaphatikiza zabwino zaukadaulo wa PON ndi ukadaulo wa Efaneti. Imatengera kapangidwe ka point-to-multipoint komanso passive optical fiber transmission kuti ipereke mautumiki angapo pamwamba pa Ethernet. Chifukwa cha kutumizidwa kwachuma komanso koyenera kwa EPON, ndi njira yolumikizirana yothandiza kwambiri kuzindikira "ma network atatu mu imodzi" ndi "mamita omaliza".
GPON ndi chiyani?
GPON (Gigabit-Capable Passive Optical Network) ndi netiweki ya Gigabit passive Optical kapena Gigabit passive Optical network. Miyezo yotengedwa ndi EPON ndi GPON ndi yosiyana. Zinganenedwe kuti GPON ndi yotsogola kwambiri ndipo imatha kutumiza ma bandwidth ambiri, ndipo imatha kubweretsa ogwiritsa ntchito ambiri kuposa EPON. Ngakhale kuti GPON ili ndi ubwino kuposa EPON pamitengo yambiri komanso mautumiki angapo, teknoloji ya GPON ndi yovuta kwambiri ndipo mtengo wake ndi wapamwamba kuposa EPON. Chifukwa chake, pakali pano, EPON ndi GPON ndi matekinoloje omwe ali ndi mapulogalamu ambiri a PON Broadband. Ndi ukadaulo uti woti musankhe zimatengera mtengo wa fiber optical access ndi zofunikira zamabizinesi. GPON idzakhala yoyenera kwa makasitomala omwe ali ndi bandwidth apamwamba, mautumiki ambiri, QoS ndi zofunikira za chitetezo ndi teknoloji ya ATM monga msana. Kukula kwamtsogolo ndi bandwidth yapamwamba. Mwachitsanzo, teknoloji ya EPON/GPON yapanga 10 G EPON/10 G GPON, ndipo bandwidth idzawongoleredwa bwino.
Pamene kufunikira kwa mphamvu za opereka maukonde kukukulirakulira, kusinthasintha kwa maukonde ofikira kuyeneranso kukulitsidwa kuti zikwaniritse zomwe zikukula izi. Fiber-to-the-home (FTTH) passive optical network (PON) optical network access ndiyo teknoloji yomwe imagwiritsidwa ntchito kwambiri komanso yogwiritsidwa ntchito kwambiri. Ubwino waukadaulo wa PON ndikuti ukhoza kuchepetsa ntchito za msana wa fiber optical fiber ndikusunga ndalama; mawonekedwe a maukonde ndi osinthika ndipo luso lakukulitsa ndilolimba; kulephera kwa zida za passive optical ndizochepa, ndipo sikophweka kusokonezedwa ndi chilengedwe chakunja; ndipo luso lothandizira bizinesi ndilolimba.